[go: up one dir, main page]

MX168298B - A PROCESS TO PRODUCE A WEAR-RESISTANT ITEM AND THE ITEM PRODUCED - Google Patents

A PROCESS TO PRODUCE A WEAR-RESISTANT ITEM AND THE ITEM PRODUCED

Info

Publication number
MX168298B
MX168298B MX205567A MX20556785A MX168298B MX 168298 B MX168298 B MX 168298B MX 205567 A MX205567 A MX 205567A MX 20556785 A MX20556785 A MX 20556785A MX 168298 B MX168298 B MX 168298B
Authority
MX
Mexico
Prior art keywords
component
item
present
combinations
amorphous
Prior art date
Application number
MX205567A
Other languages
Spanish (es)
Inventor
David Milton Scruggs
Original Assignee
Dresser Ind
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dresser Ind filed Critical Dresser Ind
Publication of MX168298B publication Critical patent/MX168298B/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
    • C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12931—Co-, Fe-, or Ni-base components, alternative to each other
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12937—Co- or Ni-base component next to Fe-base component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12951—Fe-base component

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Geology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Glass Compositions (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Physical Vapour Deposition (AREA)
  • Laminated Bodies (AREA)

Abstract

La presente invención se refiere a un proceso para producir un artículo resistente al desgaste, caracterizado en que comprende los pasos de: proporcionar un material no amorfo, transformable friccionalmente, sobre al menos una porción de la superficie del artículo, en donde el material no amorfo consta esencialmente de: un primer componente, seleccionado del grupo que consta de hierro y combinaciones de hierro y cobalto, dicho primer componente estando presente en una cantidad de 40 a 75 por ciento en peso, aproximadamente, un segundo componente, seleccionado del grupo que consta de tungsteno, molibdeno, cromo, niobio, vanadio y combinaciones de tungsteno, molibdeno, cromo, niobio, vanadio y titanio, dicho segundo componente estando presente en una cantidad de un 20 por ciento en peso, y un tercer componente seleccionado del grupo que consta de boro, carbono y sus combinaciones, dicho terrcer componente estando presente en una cantidad de 2 a 6 por ciento en peso, aproximadamente; y transformar al menos una porción de la capa más externa del material no amorfo, transformable friccionalmente, al estado amorfo, sometiendo el material a fuerzas friccionales suficientemente severas.The present invention relates to a process for producing a wear resistant article, characterized in that it comprises the steps of: providing a non-amorphous, frictionally transformable material on at least a portion of the surface of the article, where the non-amorphous material It consists essentially of: a first component, selected from the group consisting of iron and combinations of iron and cobalt, said first component being present in an amount of approximately 40 to 75 weight percent, a second component, selected from the group consisting of of tungsten, molybdenum, chromium, niobium, vanadium, and combinations of tungsten, molybdenum, chromium, niobium, vanadium, and titanium, said second component being present in an amount of 20 percent by weight, and a third component selected from the group consisting of boron, carbon and their combinations, said third component being present in an amount of approximately 2 to 6 weight percent; and transforming at least a portion of the outermost layer of the frictionally transformable, non-amorphous material to the amorphous state, subjecting the material to sufficiently severe frictional forces.

MX205567A 1984-06-08 1985-06-06 A PROCESS TO PRODUCE A WEAR-RESISTANT ITEM AND THE ITEM PRODUCED MX168298B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/618,885 US4725512A (en) 1984-06-08 1984-06-08 Materials transformable from the nonamorphous to the amorphous state under frictional loadings

Publications (1)

Publication Number Publication Date
MX168298B true MX168298B (en) 1993-05-14

Family

ID=24479536

Family Applications (1)

Application Number Title Priority Date Filing Date
MX205567A MX168298B (en) 1984-06-08 1985-06-06 A PROCESS TO PRODUCE A WEAR-RESISTANT ITEM AND THE ITEM PRODUCED

Country Status (10)

Country Link
US (1) US4725512A (en)
EP (1) EP0168931B1 (en)
JP (1) JPH0768624B2 (en)
AU (1) AU4330885A (en)
BR (1) BR8502645A (en)
CA (1) CA1240216A (en)
DE (1) DE3574167D1 (en)
MX (1) MX168298B (en)
NO (1) NO173884C (en)
ZA (1) ZA853300B (en)

Families Citing this family (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4943698A (en) * 1985-12-31 1990-07-24 Eaton Corporation Hardfacing powders
GB8711697D0 (en) * 1987-05-18 1987-06-24 Secr Defence Brit Coated titanium articles(ii)
US4793043A (en) * 1987-07-07 1988-12-27 Cummins Engine Company, Inc. Fuel pump distribution assembly salvage method
US4965139A (en) * 1990-03-01 1990-10-23 The United States Of America As Represented By The Secretary Of The Navy Corrosion resistant metallic glass coatings
US5030519A (en) * 1990-04-24 1991-07-09 Amorphous Metals Technologies, Inc. Tungsten carbide-containing hard alloy that may be processed by melting
US5114808A (en) * 1990-05-07 1992-05-19 Eveready Battery Company, Inc. Cell cover with internal compression ring of high yield strength material
US5589012A (en) * 1995-02-22 1996-12-31 Systems Integration And Research, Inc. Bearing systems
US5695825A (en) * 1995-05-31 1997-12-09 Amorphous Technologies International Titanium-containing ferrous hard-facing material source and method for hard facing a substrate
US5632861A (en) * 1995-06-08 1997-05-27 Beloit Technologies, Inc. Alloy coating for wet and high temperature pressing roll
US6376091B1 (en) 2000-08-29 2002-04-23 Amorphous Technologies International Article including a composite of unstabilized zirconium oxide particles in a metallic matrix, and its preparation
US6767419B1 (en) 2000-11-09 2004-07-27 Bechtel Bwxt Idaho, Llc Methods of forming hardened surfaces
US6689234B2 (en) * 2000-11-09 2004-02-10 Bechtel Bwxt Idaho, Llc Method of producing metallic materials
US7323071B1 (en) 2000-11-09 2008-01-29 Battelle Energy Alliance, Llc Method for forming a hardened surface on a substrate
AU2003213841A1 (en) * 2002-03-11 2003-09-29 Liquidmetal Technologies Encapsulated ceramic armor
US6605818B1 (en) * 2002-03-28 2003-08-12 The Boeing Company Method for protecting against ionizing radiation using a sprayed protective coating, and a protected structure
AU2003252040A1 (en) 2002-07-17 2004-02-02 Liquidmetal Technologies Method of making dense composites of bulk-solidifying amorphous alloys and articles thereof
WO2004009268A2 (en) * 2002-07-22 2004-01-29 California Institute Of Technology BULK AMORPHOUS REFRACTORY GLASSES BASED ON THE Ni-Nb-Sn TERNARY ALLOY SYTEM
US8002911B2 (en) * 2002-08-05 2011-08-23 Crucible Intellectual Property, Llc Metallic dental prostheses and objects made of bulk-solidifying amorphhous alloys and method of making such articles
USRE47321E1 (en) 2002-12-04 2019-03-26 California Institute Of Technology Bulk amorphous refractory glasses based on the Ni(-Cu-)-Ti(-Zr)-Al alloy system
US8828155B2 (en) 2002-12-20 2014-09-09 Crucible Intellectual Property, Llc Bulk solidifying amorphous alloys with improved mechanical properties
WO2004059019A1 (en) * 2002-12-20 2004-07-15 Liquidmetal Technologies, Inc. Pt-BASE BULK SOLIDIFYING AMORPHOUS ALLOYS
US7896982B2 (en) * 2002-12-20 2011-03-01 Crucible Intellectual Property, Llc Bulk solidifying amorphous alloys with improved mechanical properties
US7520944B2 (en) * 2003-02-11 2009-04-21 Johnson William L Method of making in-situ composites comprising amorphous alloys
US20060151031A1 (en) * 2003-02-26 2006-07-13 Guenter Krenzer Directly controlled pressure control valve
US20050077090A1 (en) * 2003-08-13 2005-04-14 Ramamurthy Viswanadham Apparatus and method for selective laser-applied cladding
US7618499B2 (en) 2003-10-01 2009-11-17 Johnson William L Fe-base in-situ composite alloys comprising amorphous phase
US20050136279A1 (en) * 2003-12-22 2005-06-23 Xiangyang Jiang Chrome composite materials
US20050132843A1 (en) * 2003-12-22 2005-06-23 Xiangyang Jiang Chrome composite materials
US7341765B2 (en) * 2004-01-27 2008-03-11 Battelle Energy Alliance, Llc Metallic coatings on silicon substrates, and methods of forming metallic coatings on silicon substrates
JP4072132B2 (en) * 2004-03-31 2008-04-09 大同メタル工業株式会社 Sliding bearing manufacturing method
WO2006034054A1 (en) * 2004-09-16 2006-03-30 Belashchenko Vladimir E Deposition system, method and materials for composite coatings
JP4816059B2 (en) * 2005-12-16 2011-11-16 ブリヂストンスポーツ株式会社 Golf club head
BRPI1004901A2 (en) * 2009-01-08 2016-04-05 Eaton Corp method for forming a wear resistant cover and wear resistant cover system
WO2011116350A1 (en) 2010-03-19 2011-09-22 Crucible Intellectual Property, Llc Iron- chromium- molybdenum - based thermal spray powder and method of making of the same
BRPI1101402A2 (en) * 2011-03-29 2013-06-04 Mahle Metal Leve Sa sliding element
JP5829534B2 (en) * 2012-01-24 2015-12-09 三菱重工業株式会社 Welding method
US9909201B2 (en) * 2012-07-04 2018-03-06 Apple Inc. Consumer electronics machined housing using coating that exhibit metamorphic transformation
US20180029241A1 (en) * 2016-07-29 2018-02-01 Liquidmetal Coatings, Llc Method of forming cutting tools with amorphous alloys on an edge thereof
JP6808560B2 (en) * 2017-04-03 2021-01-06 株式会社豊田中央研究所 Sliding system
US11371108B2 (en) 2019-02-14 2022-06-28 Glassimetal Technology, Inc. Tough iron-based glasses with high glass forming ability and high thermal stability
CN111607765A (en) * 2019-11-13 2020-09-01 哈尔滨理工大学 Method for improving high temperature friction and wear resistance of M50 steel by W-Cr-Mo-Nb alloying

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3322546A (en) * 1964-04-27 1967-05-30 Eutectic Welding Alloys Alloy powder for flame spraying
GB1505841A (en) * 1974-01-12 1978-03-30 Watanabe H Iron-chromium amorphous alloys
US4067732A (en) * 1975-06-26 1978-01-10 Allied Chemical Corporation Amorphous alloys which include iron group elements and boron
CA1067256A (en) * 1976-02-17 1979-12-04 Bernard H. Kear Skin melted articles
US4124737A (en) * 1976-12-30 1978-11-07 Union Carbide Corporation High temperature wear resistant coating composition
US4124472A (en) * 1977-02-28 1978-11-07 Riegert Richard P Process for the protection of wear surfaces
US4163071A (en) * 1977-07-05 1979-07-31 Union Carbide Corp Method for forming hard wear-resistant coatings
GB2005302A (en) * 1977-10-04 1979-04-19 Rolls Royce Nickel-free cobalt alloy
FR2405307A1 (en) * 1977-10-04 1979-05-04 Rolls Royce hard-facing nickel alloys - by using a cobalt chromium silicon (boron) strip and heat bonding
US4409296A (en) * 1979-05-09 1983-10-11 Allegheny Ludlum Steel Corporation Rapidly cast alloy strip having dissimilar portions
JPS55148752A (en) * 1979-05-11 1980-11-19 Nippon Steel Corp Formation method of coating on metal surface
US4260416A (en) * 1979-09-04 1981-04-07 Allied Chemical Corporation Amorphous metal alloy for structural reinforcement
JPS56112449A (en) * 1980-02-06 1981-09-04 Tdk Corp Treatment of amorphous magnetic alloy material
JPS56122669A (en) * 1980-03-05 1981-09-26 Hitachi Ltd Member having high errosion-corrosion resistance
JPS57200536A (en) * 1981-06-02 1982-12-08 Mitsubishi Heavy Ind Ltd Preparation of corrosion resistant structural member
US4381943A (en) * 1981-07-20 1983-05-03 Allied Corporation Chemically homogeneous microcrystalline metal powder for coating substrates
US4515870A (en) * 1981-07-22 1985-05-07 Allied Corporation Homogeneous, ductile iron based hardfacing foils
US4645715A (en) * 1981-09-23 1987-02-24 Energy Conversion Devices, Inc. Coating composition and method
DE3216456A1 (en) * 1982-05-03 1983-11-03 Robert Bosch Gmbh, 7000 Stuttgart METHOD FOR Embedding Hard Materials In The Surface Of Chip Removal Tools
US4482612A (en) * 1982-08-13 1984-11-13 Kuroki Kogyosho Co., Ltd. Low alloy or carbon steel roll with a built-up weld layer of an iron alloy containing carbon, chromium, molybdenum and cobalt
US4487630A (en) * 1982-10-25 1984-12-11 Cabot Corporation Wear-resistant stainless steel
US4564396A (en) * 1983-01-31 1986-01-14 California Institute Of Technology Formation of amorphous materials

Also Published As

Publication number Publication date
NO852306L (en) 1985-12-09
BR8502645A (en) 1986-02-12
AU4330885A (en) 1985-12-12
ZA853300B (en) 1985-12-24
JPS613888A (en) 1986-01-09
EP0168931B1 (en) 1989-11-08
DE3574167D1 (en) 1989-12-14
US4725512A (en) 1988-02-16
CA1240216A (en) 1988-08-09
NO173884C (en) 1994-02-16
EP0168931A2 (en) 1986-01-22
JPH0768624B2 (en) 1995-07-26
EP0168931A3 (en) 1986-03-19
NO173884B (en) 1993-11-08

Similar Documents

Publication Publication Date Title
MX168298B (en) A PROCESS TO PRODUCE A WEAR-RESISTANT ITEM AND THE ITEM PRODUCED
KR910012314A (en) Coated cemented carbide and its manufacturing method
MX3303E (en) IMPROVEMENTS IN METHOD TO PRODUCE A SINTERED CERAMIC BODY AND RESULTING PRODUCT
MX172542B (en) IMPROVEMENTS IN SPRAY ROLLER OF A HIGH ALLOY RESISTANCE TO ABRASION
ES460578A1 (en) Coated super-hard alloy articles
ES2140066T3 (en) STAINLESS STEEL POWDERS AND ARTICLES PRODUCED THEREOF BY POWDER METALLURGY.
ES2132431T3 (en) PREPARATION PROCEDURE OF A TITANIUM ALLOY PRODUCT.
MX166399B (en) COATING MATERIAL AND METHOD FOR APPLYING THE SAME TO PRODUCE WEAR AND CORROSION RESISTANT COATED ARTICLES
AR012350A1 (en) A STEEL ITEM OF TOOLS FOR COLD WORK, PULVIMETALURGICO, RICH IN VANADIUM RESISTANT TO WEAR, VERY DENSE, WORKED IN HOT WITH HIGH RESISTANCE TO IMPACT AND A METHOD TO PRODUCE SUCH ITEM.
SE7910505L (en) NICKEL ALLOY AND ITS IMAGE OR THEREOF TRANSFER FORM
ES2149755T3 (en) BLADE COMPONENTS OF METALLOCERAMIC MATERIAL COATED ON SURFACE.
ATE79415T1 (en) ARTICLES MADE OF A WEAR AND CORROSION RESISTANT ALLOY.
DE2018662A1 (en) Composite material for cutting tools
EP0123961A3 (en) Abrasion-resistant composite article and process for its manufacture
ES2221126T3 (en) PREPARED ARTICLE OF FASTENING STEEL CUTTING FAST OF HIGH HARDNESS.
ATE57676T1 (en) PROCESSES FOR THE MANUFACTURE OF CARBIDE-BORIIDE PRODUCTS AND THEIR USE.
ES383805A1 (en) A METHOD OF PRODUCING A STEEL COMPOSITION FOR CARBIDE TOOLS CONTAINING CHROME.
MX169537B (en) VITREO ENAMEL COMPOSITION FOR COATING AND METHOD FOR FORMING A GLASS SHEET COATED WITH VITREO ENAMEL
GB1324484A (en) Knives for fibre tow-cutting apparatus
BG49386A3 (en) Crossroad, especially middle of crossroad for railway points and a method for its realizing
SE8700095D0 (en) COBLE BASE ALWAYS AS COATING MATERIAL FOR CHAIN SAW
ES8100812A1 (en) Powder-metallurgy vanadium-containing tungsten-type high-speed steel
NO167714C (en) PROCEDURE FOR THE MANUFACTURING OF PEN HEARTS.
KR870008049A (en) Articles embodying wear resistant surface layers
GB1530776A (en) Skin melted articles